Acronyms

This list is not inclusive or extensive. You may be aware of other acronyms or organizations. We have mentioned these organizations as a means of providing a potentially useful referral. You should contact the organization(s) directly for more information about their services. Please note that mention of these organizations does not represent a recommendation or endorsement by CCOHS of these organizations over others of which you may be aware.

LC50 or LC50 – Lethal Concentration [The concentration in air which is lethal to 50% of the test animals in a study. A convenient point of comparison between toxic materials with similar effects or target organs.]

LD50 or LD50 – Lethal Dose [The experimental dose which is lethal to 50% of the test animals in a study. A convenient point of comparison between toxic materials with similar effects or target organs.]

LEED – Leadership in Energy and Environmental Design

LEL – Lower Explosive Limit

LEV – Local Exhaust Ventilation

LOAEL – Lowest Observed Adverse–effect Level

LPG – Liquefied Petroleum Gas

LSO – Laser Safety Officer

LTD – Long–term disability

MAMI – Mining Association of Manitoba Inc

MASHA – The former Mines and Aggregates Safety and Health Association (Ontario) [Now part of the WSN]

MHSA – The former Municipal Health and Safety Association (Ontario) [Now part of the PSHSA]

MHSA – Manufacturers' Health & Safety Association (Alberta)

MOE – Ministry of the Environment (Ontario)

MOL – Ministry of Labour (Ontario)

MSD – Musculoskeletal Disorders

MSDS – Material Safety Data Sheet

MSHA – Mine Safety and Health Administration (USA)

MSI – Musculoskeletal Injuries

NAALC – North American Agreement on Labour Cooperation

NAOSH – North American Occupational Safety and Health Week

NBFSA – New Brunswick Forest Safety Association

NCEOE – National Committee on Environmental and Occupational Exposures

ND – Non Detectable

NDSL – Non-Domestic Substances List

NDT – Non Destructive Testing

NEER – New Experimental Experience Rating Program (ON)

NFC – National Fire Code

NFPA – National Fire Protection Association (USA)

NIDMAR – National Institute of Disability Management and Research

NIH – National Institutes of Health (USA)

NIHL – Noise Induced Hearing Loss

NIOSH – National Institute for Occupational Safety and Health (USA)

NJC – National Joint Council

NLCSA – Newfoundland and Labrador Construction Safety Association

NOAEL – No Observed Adverse Effect Level

NORA – National Occupational Research Agenda (USA)

NORM – Naturally Occurring Radioactive Material

NSC – National Safety Council (USA)

NSCSA – Nova Scotia Construction Safety Association

NSNY – Northern Safety Network Yukon

NTP – National Toxicology Program (USA)

NWISP – National Work Injury/Disease Statistics Program

OA – Occupational Asthma

OAFC – Ontario Association of Fire Chiefs

OBA – Octave Band Analyzer

OEA – Office of the Employer Adviser (Ontario and in general)

OECD – Organization for Economic Cooperation and Development

OEHF – Occupational & Environmental Health Foundation (USA)

OEL – Occupational Exposure Limit

OEMAC – Occupational and Environmental Medical Association of Canada

OFAAA – Occupational First Aid Attendants Association of British Columbia

OFSWA – The former Ontario Forestry Safe Workplace Association [Now part of the WSN]

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Although every effort is made to ensure the accuracy, currency and completeness of the information, CCOHS does not guarantee, warrant, represent
or undertake that the information provided is correct, accurate or current. CCOHS is not liable for any loss, claim, or demand arising directly or
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